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They're doing... 复数进行时 — 英语选择题

外研版·英语(三起) Module 3 What are they doing? AI 三重审校通过

题目
公园里,蓝队的四个人正在划船,红队的三个人正在拍照。广播问红队的人在做什么。选出正确的回答:A. They're rowing a boat. B. They're taking pictures. C. They're take pictures. D. He's taking pictures.